2014 CLS550 - P014A error code
The check engine light stays on for a few days, then goes off for a week or more... then returns. I've had the O2 sensor replaced, but am still getting the same message on the same frequency. The car seems to run ok with the check engine light on, but might be a bit sluggish in acceleration.
I've tried Chevron fuel injector cleaner to no avail.
Any thoughts or additional diagnostics I can run? Looking to resolve...
Thanks in advance - David


